Normally replaceable-slightly different: 6137 Other class quality (otherwise equal): 6SK7
Base
Octal (Int.Octal, IO) K8A, USA 1935
Filament
Description
Micanol, low-loss base.
Tube prices
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Literature
- - Manufacturers Literature
6SK7WA: MB
Martin Bösch
6SK7WA: RTT Schwandt
Günther Stabe
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